Apparatus for manufacturing barbed wire



APPARATUS FOR MANUFACTURING BARBED WIRE Mrch 27,1928. 1,663,615

o. sci-1Min APPARATUS FOR MANUFACTURING BARBED WIRE Filed Dec. e. 192s 2 sheets-snee: 2

Patented Mar. 27, 1928..

orrcro senntrn, on REUTL'INGEN, WRTTEMBERG, GERMANY.

APPARATS FOR MANUFACTURIG BRBED WIRE.

Application filed December 6, 1923,l Serial No. 679,016, and in Germany July 9, 1923.

Thepresent inventioh relates to apparatns for manufacturing barbed wire par` The machine `according to the present invention operates in such a manner that the wires are irst conveyed while lying closely adjacent to one another through a special `guide to a twisting tool which is set in rotation intermittent-ly and twists together the wires passing through. In order to obtain only local twisting the wires are secured ,eitherat one side or both in front of and behind the twisting tool. In ythe first case the twisted portions are twisted one after the other, either all in the same direction or alternatively left and right wounded, in the latter case two twisted portions are produeed'in the same time and are left and right twisted. New, cutting tools come into action ononefof the, wires, and yare so constructed that after the cutting of the wire they also eiiect the bending in such a wav that one severed end stands upwards an the other severed end downwards, the ends .lying in the same plane. When this opera- .",5 tion is finished the wires are moved forward mechanically to an extent dependingr on the spacinglrequired between the n barbs, by means of a feed device, vwhich may take the form of a drawing-inr roller for example.

4o One embodiment ofthje invention is illus- Atrated Vin the accompanying drawings in which. y f

Fig; l is a side elevation of apparatus embraeing the principles of the invention;

Fig. 2 is alfront elevation of the apparatas;` o

Figs. 3 and 4 are elevational views show- -ingl respectively, the advance and return positions of the cutting and bendingnieans;

Figs. 5 and 6 are planand side elevational' views of the cutting and bending tools, t-he wires being shown in section in Fig. 7

Figi is an elevation of-a modified form ofcutting and bending means;

Figs. 8 and 9 are considerably enlarged cross-sections 'of the wire-guide rolls showing two `diiierent forms of construction;`

Figs. l0 and ll, and Figs. 1-2 and13, illustrate,-in end elevation, two different means for positioning alternate pairs of barbs at right angles to each other; and Y Fig. 14 shows in end` elevationfanother Vform of barbed bending device.

l The wires a to be worked, which may have the ksaine or ,diiierent thickness, are introduced into the machine by a .pairof drawingin rollers shown in Fig. l and alsoin Section in two forms in Figs. 8 and 9, said rollers 7 being intermittently; rotated :from the cam disk 8, by. means` suchr as the pending oscillating lever 9Hand the gear segment 10 f at the tree end.k ,The gear 11 engaging -in segment l0 (not shown) has al concealed unilateral acting drive pawl which causes the rollers to rotateonly kin the advanced direction, notwithstanding the swinging mpvement of the segment, and :ted forward to a` `distance equal Lto* that between barbs. The ywires, pass through a guide c and `then approach a twisting tool Lof conventional `form and serving to, grip the..

wires to hold themr from. relative `movement and to twist the wireson each 'side ofthe twistingtool. Adjacent to d `is agrippingdevice c of any desired `form, for secu-ring the wires in a stationarycondition during the twisting y(see Fig. 1);. Such a device may be-arranged at each side of the twisting tool or onlv at one side, according to requirements, thatijs to say, if two twisted portions are` desired at the same time (with leftand right winding) or only one at a time is desired. `The' twisting-tool' d may-,workin the latter case in such a manner, that it ytwists either always in the same directiomor alternately to left and to rig-ht.

Aftertheltwisting operation, the wires are Yied, forwards an amount equallto the jdis- F tance between barbs when the twisted, portions reaeh cutting tools f which cut through 'one of 'the wires `between* the twisted yportions and in the forward and backward movement ofthe cutters bendv the'opposite 'ends gin thesame planeand in two opposite directions, so that the barbs are -formed as in Fig. 4, whereupon thek wires' a are. moved another barbs-space distance. f

- "Wh-ile `irnkno'wn apparatus each of the wires -hasjbeen fed independently `by aspecial feed device, according to the present invention they are moved forward by a single pair of rollers b, so constructed that the two wires a are pressed against one another together (see Figs. 8 and 9). Thereby the advantage is gained that an absolutely uniform feed movement is obtained for both strands, even when the thickness of the wire is not the same and irregularities appear.

This pressing together of the two wires a is effected by their lying in the same recess L in the rollers I) and this being furnished with oblique sides which exercise a wedging effect, that is to say press the two wires a oneV against the other. The recess Zr may be in both rollers as shown in Fig. 8` or in one only as shown in Fig. 9.

The wire guide 0 may be of any kind, but is so constructed that it prevents any turning of the wires a when the twisting tool Z is operating and thereby itself forms a firm holding device, so that in consequence of the provision of the second securing device e the wires are only twisted between these two devices. This second device e may be in the nature of a slide, which has a slot whose width corresponds with theV thickness of the wire.

The constructional form of the twisting tool al is likewise optional, as is also the means of driving it. It consists essentially of some kind of rotary body, which merely seizes the wires in such a manner that they must participate in the rotation. The tools l operate according to the desired barbed Wire, either in one direction only or alter- V nately in opposite directions.

The twisting tool l is rotated in manner not shown and retained by means of a slide 12, which is drivenY or controlled by the eccentric 13. The twist-ing point lies here in the tool Z and the wires a are rigidly held at both sides thereof. For this purpose use is made of a lever 14, on the entering side, which'is controlled by an eccentric groove 15, and on the other side the retaining member e which is controlled by eccentric 16. The wire which is twisted at certain points, that is, at certain distances apart, now passes to the tools f which co-operate with the corresponding tools m and are mounted on a slide 17 controlled or driven by eccentric 18.

The tools f and m are so formed that in the forward movement they cut the one wire yand'bend one of the resulting ends, and on the return movement, on the contrary bend the other end and to the other side (see Fig.

'4), the two barbs so formed, however, lying iin the saine plane. being on the cutting tool f, on the one side a This is assured by there shoulder z', which in the forward movement passes beyond one of the wire ends g, but on the return movement comes into contact with and bends said end, as shown in Fig. 4. The cooperating tool m, as shown in Fig. 5, has an inclined cutting edge.

The formation and number of the different tools is of secondary importance as regards the essence of the invention, as is also the number of the wires to be worked simultaneously.

Figs. Gand 7 illustrate the manner of the working of the tools. The lower tool m stands at an angle of 90 to the other tool In the meantime withthe moving upward of the tool the tool m moves forward. The shoulder a' on tool j slides over the wire, then the cutting edge it of the tool f (see Fig. 7) approaches the wire, cuts it through, and bends it in one direction. The tool f then returns, and in returning the shoulder 2'. bends the other end of the cut wire in the opposite direction.

rlhe form and number of the tools is 0f a secondary nature, as well as the numberof the wires.

The barbs now lie all inV one plane. With the swaged-like tools, illustrated in Figs. 10 and 11 as well as in 12 and 13, continuously one of the barb-pairs 'is bent above and the other below, so that they stand round the guiding-wire. For this purpose the conical stamps f,7, press the wire into the respective recesses in dies fm', fm, by`which the barbs g are bent from the positions of Figs. l0 and 12 into those of Figs. l1 and 13. By the tools of the Figs. 10 and 11 the barbs g are bent upwards, and by the tools of the Figs. 12 and 13 the barbs of the next pair are bent downwards.

The swages may have any form, so, for instance they may have a form working only at one side as in Fig. 14. Here a stamp fv works only against one ofthe barbs g and presses it downwards, whereby the other twin barb g of the same wire piece by means of m" is moved upwards. If the barbs of every other barb-pair are thus bent, the barbs stand around the guiding wire as shown n Fig. 14.

l claim g 1. Apparatus for manufacturing single strand barbed wire, comprising means for holding the wires against rotation, means for feeding the wires through the guide to a working point, said means being constructed to press the wires against oneranother, thereby to secure uniform speed of feed regardlessof differences in thickness of the Wires, securing means adjacent the working point on the opposite side from said holding means to prevent the wires from turning, a. twisting device at the working point for twisting both wires simultaneously to form spaced twisted parts with for bending the cutends to form outstand ing barbs.

2. Apparatus for manufacturing single stra-nd barbed wire, comprising a guide for said wires, means for kfeeding the wires through the guide to a working point, said means being constructed to press the wires against one another, thereby to secure uni-- form speed of feed regardless of differences in the thickness of the wire, securing means adjacent the working point on the opposite side from said. guide to prevent the wires from turning, a twisting device at the working point for twisting both wires simultaneously to form spaced twisted parts with parallel wire portions therebetween, cutting tools positioned beyond the twisting device arranged to sever but one of the wires between adjacent twisted portions, said` cut,- ting means being constructed to bend the cut ends of said wire to form outstanding barbs.

3. Apparatus according to claim 2, in which the feeding means comprises contact rollers constructed to form between them a wedge-shaped recess to press the wires against each other.

, of the wires therein.

5. Apparatus according to claim 2, said twist-ing device being arranged to operate constantly in a single direction or alternately in opposite directions.

6. Apparatus according to claim 2, one of said cutting tools having a recess on one side, and means to move such tool in one direction to pass it over the wire to be cut, and means to give it a return movement in the opposite direction so as to seize and bend such cut wire.

7. Apparatus according to claim 2, said cutting tools being formed so that they bend one cut wire end on the forward movement, and the other cut wire end on theV return movement.

8. Apparatus according to claim 2, said cutting tools being formed so that they bend one cut wire end on the forward movement, and the `other cut wire end on the return movement, said other cut end being bent only after one of the cutting tools has descended.

9. Ap aratus according to claim 2, a die means Y or turning every second pair of barbs to stand at an angle of 90 to the adjacent pairs of barbs.

In testimony whereof I aiix my signature.

OTTO SCHMID. 

